Byrst

According to the Old English Dictionary:

berst, es;

byrst

m. A loss, defect; damnum, calamitas :-- Gylde ðone byrst, ðe ðæt fýr ontende reddet damnum, qui ignem succenderit, Ex. 22, 6, 12: Ps. Th. 108, 18. We habbaþ fela byrsta gebiden multas calamitates sumus perpessi, Lupi Serm. i. 2; Hick. Thes. ii. 99, 21. byrst